Sanding machine



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Jan. 19, 1937. H. L. MYERS SANDING MACHINE Filed July 24, 1956 INVENTOR Harry A. Nye/1s WW A TTORNE Y5.

Patented Jan. 19, 1937 UNITED STATES PATENT OFFICE Barry L. Myers, Toledo, Ohio, assignor to The American Floor Surfacing Machine Company, Toledo, Ohio, a corporation of Ohio Application July 24, 1936, Serial No. 92.457

3 Claims.

This invention relates primarily to sanding machines of the motor driven, sanding drum. dust collecting type, and has for its object such a combining and arranging of the motor, sanding drum and dust collecting elements as to enhance the practicability and commercial value thereof.

A further object of the invention is to so arrange the motor, the suction fan for the dust collector, the drive for the sanding drum and the dust conduit to the fan chamber as to improve the design and obtain a balanced and more efficient action of the machine.

The invention is fully described in the following specification and illustrated in the accompanying drawing, in which- Figure 1 is a side elevation of a sanding machine embodying the invention, with parts broken away, and Fig. 2 is a section on the line 2-2 in Fig. 1.

2 Referring to the drawing, 1 designates the machine housing supported forward of its longitudinal center of gravity by a pair of laterally spaced wheels 2 and at its rear by a caster wheel 3, as well understood in the art.

25 The sanding drum 4 is mounted in the lower front portion of the housing I with its axis transverse to the housing and its shaft joumaled in suitable bearings 5 carried by the housing sides.

The motor 6 for driving the sanding drum is located in the top portion of the housing substantially above and to the rear of the drum 4 with its rotor shaft 1 transverse to the housing, paral lel to the drum shaft, and journaled in bearings 8 and 9 provided in the respective sides of the 35 housing. The major portion of the motor is disposed to one side of the vertical longitudinally extending center plane of the machine, or in the present instance at the side with the bearing 8, thus leaving a substantial space between the op- 40 posite end of the rotor. Ill and the bearing 9. This space is divided and formed into a fan chamber II at the outer side of the space and a dust collecting conduit-throat I! at the inner side of the space and between the chamber l I and 45 adjacent rotor end. The throat I2 opens into the chamber l l at its central portion and around the adjacent end portion, of the shaft 1. A draft creating fan I3 is mounted on the shaft 1 within the chamber ll.

50 The throat I! connects at its lower end with a broadening mouthpiece I 4, which has its inlet end flaring to the width of the drum 4 and terminating adjacent to the rear side of such drum near the floor line, so thatdust created by the 55 sanding operation of the drum will be drawn into the mouthpiece by suction action therethrough. It is apparent that the mouthpiece M of the dust collecting conduit is broad at its inlet end and then gradually diminishes in width to a point where it merges into the throat portion [2 of 5 the conduit, which latter portion is narrow transversely of the machine, but relatively broad lengthwise thereof. This enables the fan l3 and its housing to be disposed at one side of the machine housing I in spaced relation to the motor 6 and for the throat portion l2 of the dust collecting conduit to be disposed between the fan and motor, thus providing a compact and balanced arrangement of such element transversely of the machine.

The motor shaft 1 projects beyond the bearing 9 without the adjacent side of the frame I where it is connected by a pulley I5 and one or more belts IE to a pulley H on the adjacent end of the sanding drum shaft. These pulleys, belts and shaft ends are enclosed, except at the bottom near the drum, by a removable casing l8.

The fan chamber H at its rear side has a peripherally disposed outlet passage 20 in communication through a conduit 2| with a bag or other dust-receiving means, not shown, but which is common to machines of this character. 22 designates the handle by which the movement of the machine is controlled.

I wish it understood that my invention is not limited to any specific construction, arrangement or form of the parts, as it is capable of numerous modifications and changes without departing from the spirit of the claims.

Having thus described my invention, what I 00 claim as new, and desire to secure by United States Letters Patent, is:

1. In a sanding machine, a housing, a sanding drum and motor mounted in the housing with their shafts transverse thereto, a driving connection between said shafts, a fan mounted on the motor shaft within one side portion of the housing, means forming a chamber enclosing the fan, and a dust collecting conduit with its receiving mouth adjacent to the drum periphery and with its throat between the fan and motor and in central communication with the fan chamber, said chamber having an outlet.

2. In a sanding machine, a housing, an electric motor mounted in the upper portion of the housing with its rotor shaft transverse to the housing and journaled in its sides, a sanding drum disposed in the lower portion of the housing with its shaft parallel to the rotor shaft and journaled in the housing sides, means within the housing forming a fan chamber around the rotor shaft and in outwardly spaced relation to the adjacent end of the rotor and also forming a dust collecting conduit with its throat relatively narrow transversely of the housing and disposed between saidrchamber and rotor in communication with the former and with its mouth opening adjacent to the lower peripheral portion of the drum and broadened in width to correspond to the length of the drum, a fan mounted on the rotor shaft within said chamber, and driving connection between said rotor and drum shafts without said chamber.

3. In a sanding machine, a sanding drum mounted in the lower forward portion of the housing with its shaft transverse to the housing and journaled in its sides, an electric motor mounted within the upper portion of the housing and having its major portion disposed at one side of the vertical longitudinal center plane of the machine, the rotor shaft of said motor disposed parallel to the drum shaft and J'ournaled in the housing sides with one end extended beyond the housing, said rotor being spaced from the side of the housing from which the shaft extends, a driving connection between the extended end of the rotor shaft and said drum shaft, means in said space forming a fan chamber and a dust collecting conduit opening into said chamber centrally thereof, said conduit being disposed between the fan chamber and said rotor and having a broadened mouth portion opening adjacent to the lower peripheral portion of the drum, and a fan on the rotor shaft within said chamber, said fan chamber having an outlet at one side.

HARRY L. MYERS. 

